The purpose of the present invention is to provide a stereo x-ray radiation device that is small and for which handling is simple. One cathode that functions as an emitter and two anodes that function as targets are disposed in a single straight-tube shaped vacuum vessel. The stereo x-ray generating device is characterized by the cathode being a cold cathode disposed in the center part of the vessel, the anodes being disposed each to one end of the vessel, and the spaces between the anodes disposed in the two ends of the vessel and the cathode being constituted such that the same can be moved closer or apart along the axial line of the vessel.【課題】小型で取り扱いが簡単なステレオＸ線放射装置を提供する。【解決手段】Ｘ線管装置は、アノード４の後端よりも更に外側には配置した電磁石７に通電すると瞬時にアノード４の後端を吸着する機構を備える。これにより左右のアノード４,４は軸方向外方に移動する。その結果２つのＸ線発生源間の距離が瞬時に拡大したことになる。【選択図】図２
